Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector
Abstract
We have studied the e+e- -> omegapi0 cross section in the sqrt(s) interval 1000-1030 MeV using the pi+pi-pi0pi0 and pi0pi0gamma final states with a sample of ~600 pb^-1 collected with the KLOE detector at DAFNE. By fitting the observed interference pattern around M_phi for both final states, we extract the ratio of the decay widths Gamma(omega->pi0gamma)/Gamma(omega->pi+pi-pi0) = 0.0897 +- 0.0016 and derive the branching fractions BR(omega -> pi+pi-pi0)= (90.24 +- 0.19)%, BR(omega -> pi0gamma) = (8.09 +- 0.14)%. The parameters describing the e+e- -> omegapi0 reaction around M_\phi are also used to extract the branching fraction for the OZI and G-parity violating phi -> omegapi0 decay: BR(phi->omegapi0) = (4.4 +- 0.6)x10^-5.
Cite
@article{arxiv.0807.4909,
title = {Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector},
author = {The KLOE Collaboration and F. Ambrosino and A. Antonelli and M. Antonelli and F. Archilli and P. Beltrame and G. Bencivenni and S. Bertolucci and C. Bini and C. Bloise and S. Bocchetta and F. Bossi and P. Branchini and P. Campana and G. Capon and T. Capussela and F. Ceradini and P. Ciambrone and F. Crucianelli and E. De Lucia and A. De Santis and P. De Simone and G. De Zorzi and A. Denig and A. Di Domenico and C. Di Donato and B. Di Micco and M. Dreucci and G. Felici and M. L. Ferrer and S. Fiore and P. Franzini and C. Gatti and P. Gauzzi and S. Giovannella and E. Graziani and W. Kluge and G. Lanfranchi and J. Lee-Franzini and D. Leone and M. Martini and P. Massarotti and S. Meola and S. Miscetti and M. Moulson and S. Müller and F. Murtas and M. Napolitano and F. Nguyen and M. Palutan and E. Pasqualucci and A. Passeri and V. Patera and F. Perfetto and P. Santangelo and B. Sciascia and A. Sciubba and A. Sibidanov and T. Spadaro and M. Testa and L. Tortora and P. Valente and G. Venanzoni and R. Versaci and G. Xu},
journal= {arXiv preprint arXiv:0807.4909},
year = {2008}
}
Comments
12 Pages, 4 figures, submitted to Physics Letter B